The Heating Bills for a Selected Sample of Houses Using

Essay

The heating bills for a selected sample of houses using various forms of heating are given below. Values are in dollars.)
$\begin{array}{lll}\text { Natural Gas }&\text { Central Electric }&\text { Heat Pump }\\84 & 95 & 85 \\64 & 60 & 93 \\93 & 89 & 90 \\88 & 96 & 92 \\71 & 90 & 80\end{array}$
a. At α = 0.05, test to see if there is a significant difference among the average heating bills of the homes. Use the p-value approach.
b. Test the above hypotheses using the critical value approach. Let α = .05.